Greetings everyone. I've finally got around to trying to upload the program to the board. I've never used Marlin before, but the process seems reasonably intuitive. However, The Arduino software starts to compile. Then it informs me that it cannot find LCD.h. As I have no clue what I'm supposed to be looking for, what am I missing? Do I need to uncomment something or add something extra? I couldn't find LCD.h anywhere except at the beginning, here: #include <EEPROM.h> #include <Wire.h> #include <LCD.h> #include <LiquidCrystal_I2C.h> #include <multiCameraIrControl.h> #include <AccelStepper.h> I went and re-downloaded the .io in case it had been corrupted, with the same result. Could someone kindly walk me through the process or point me in the right direction? Thanks for your time and help. Alys